Steam-engine.



E.4 BROOKS & G. S. DOYLE. STEAM ENGINE.

APPLICATION m50 ocu-1, 1911.

1,294,762. l .Patented Feb.1s,1919.

6 SHEETS-SHEEI I.

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' ooks af e. s. DoYLE.

STEAM ENGINE.

APPLICATION FILED ocA. |917.

Ilutented Feb. 1S, 1919.

6 SHEETS-SHEE 2.

Witwe E. BROOKS 6L G. S. DOYLE.

'STEAM ENlNE.

APPLICATION FILED 0CT.4. 1917. 1,294,762. Patented Feb. 1S, 1919` BSHEETSHSHEE 3.

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E. BROOKS L G. S. DOYLE. STEAM ENGINE.

APPLICATION FILED OCT.4, 1917.

Patented Feb. 18, 1919..

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Ar i fio STEAM-ENGINE.

Specification of Letters atent.

Patented iFelo. 'll i .Application filed ctcber 4, 191'?. Serial No. 194,?49.

Yo r/ZZ 'wlw/n. it muy concern.'

Be it known that we, EDWARD Bnoons and (inonon S. Dorien, citizens of the United States, residing at Atlanta, in the county of Fulton and State of Georgia, have invented certain new and useful improvements in Steam Engines, of which the following is a specification.

Our invention relates to steam engines.

An important object of the invention, is the provision ci". means whereby the supply o1" steani to the cylinder of the engine can he properly controlled and yet introduced into the cylinder at 'full hoiler pressure, by causinga complete valve opening movement, for each stroke of the piston.

il Ai'."urther object ot the invention is to provide ineens to out oilE the supply ot steam tothe cylinder', at any desired point, in the stroke ci the piston.

Other objects and advantages o` the inven tion will he apparent during the course of the following description.

ln the aceonipanying drawings forming a part of this specification and in which like numerals are employed to designate vlike parts throughout the saine,

Figure l is a side elevation Vof an engine embodying' the invention,

Fig. 2 is a plan View oir` the saine, 4

Fig'. 3 is an end elevation of the saine,

Fig. i is a side elevation ot' the eccentric operated ineans to shift the trip-cams,

Fig. 5 is an, enlarged sectional View through the pressure operated' means for shifting an inlet or valve ot' the engine,

Fig. 6 is an enlarged detail section through theinlet valve,

Y .is an. end elevation of the guide nieans vfor the slide cani-bar,

Fig. S is a. plan View ci? means tor returning the slide cani-har to the starting position,

i together with associated elements,

Fig'. 9 is a side elevation of a plurality of cranks, included in the valve shifting means,

10 is a plan View of the same, and,

Fig. il isa side elevation of a manually operated lever and associated elements.

in the drawings, wherein for the purpose of illustration is shown a preferred -embodinientof our inyention, the numeral 20 designates the cylinder of the engine, having va' piston (not shown) to reciprocate therein. This piston is connected with a, crank shai't 2l, to rotate the saine, as is well known.

Steam is supplied t A'he opposite ends of the cylinder hy pressure operated apparatuses Q2, and exhausted from such opposite ends by separate pressure operated apparatuses 23.

Each inlet apparatus comprises a shell 2li, having a horizontal arm 25, leading into one end of the cylinder 20. Connected with the upper end of the shell 24 is one end ci a it coupling 2G, having connection `with a main steam supply pipe 27, provided with the usual throttle valve 28. Y

Each exhaust apparatus comprises a shell 29. leading into one end of the cylinder 20. At one side, the shell 29 has connection with an exhaust pipe 30, connected with a common exhaust pipe (not shown).

The apparatuses and Q3 are similar in certain respects and can he conveniently de scribed together. ln Fig. G, each shell 2li or 29 is shown as provided in its upper end with a valve seat-Bl, having an upper portion. 32 which is cylindrical and a lower tapered portion' decreasing in diameter downwardly. The lower port-ion oli the shell is provided with a horizontal weh or partition Si, having a tubular element or gland as shown. Beneath the partition 34 is a cylinder 3G, receivinga piston 37, to reciprocate therein. The partition 34 is provided Iupon its upper surface with ayalve seat 3S, having an upper portion 39,' which is cylindrical and a lower conical portion d0, decreasing in diameter downwardly, as shown.

The numeral illv designates areciprocatory valve, having an upper head 42, trein which depends a tubular portion 43, ot' smaller diaineter. T he upper head 42 is provided with an upper portion ist, which is cylindrical, and is adapted to fit within the upper cylindrical portion 32, and a lower tapered portion 45, adapted to lit within the lower coni cal portion 38. The head 42 also carries a plurality of spaced radially extending guide elements or tins 4G, preferably formed integral therewith, and contacting with the lower vertical portion 47 of the opening, and thus serving as guide means for the valve, when in operation. At the lower end of the tubular portion 43 there is formed a valve head 48 of increased diameter, having an upper portion 49 which is cylindrical, to enter the upper cylindrical portion 39 ot the openinef and a lower tapered portion 50, to enter the lower tapered portion 40. llt is thus apparent that when the valve descends esv toward its seats the steam will be practically cut ott when the portions and 49 of the 'alves enter the portions 32 and 39 of the openings, prior to the complete seating of the valve.

liiloiinted to reciprocate through the tubular portion or gland, is a valve rod 51, rigidly connected with the head l2, as shown. The valve rod has grooves Vfor receii ing suitable packing, thiisinsuring a steam-tight joint with the 2gland At its lower end. the valve rod 51 has connection with a valve littingpiston 3T, to be reciprocated thereby. It is tliiis apparent that waen steam is .introduced beneath the piston 37, the valve ll will be vmoved to the upper iinseated positionA` to supply or exhaust steam to or from the cylinder, as the case may be.

The means tor supplying and. exhausting steani to and trom the cylinder 3G, tor operatingn each supply and exhaust valve .is the same and is shown in .d 5.V Such means comprises a hotly portion or casting' 53, which rigidly secured lo the cylinder 20 hy any suitable means.

-Xs clearly shown in Fig'. 5, the casting' 53 has the cylinder `'56 rigidly secured to the upper end thereof. 'llie numeral 541 ((lesignates an inlet port, adapted to he placed-in communication with a port through the medium of a transverse port 5G. The port 55 extends upwardly and leads into the lower end oli the cylinder fll. The cylinder 3G is provided near its lower end with an exhaust port 57, having cominunication with a port 5S. The port 58 is adapted ln have. communication with a port 59. through the medium oi.t a transverse port (il). The port 59 has comn'ninici'dion with a pipe lhwhieh is connected with the conmii'ni exhaust pipe of the engine. .Year its upper end, the cylinder 3G has an exhaust port (.32. having` communication with an exhaust pipe G23. which is connected with the common exhaust pipe spt the engine. The pipe i353 also serves to supply a suitable amount ot steam 'troni the common exhaust pipe into the upper end of the cylinder gli. thereby 'lgirnniuc` a cushion for the piston 37. as it approaches the end of its up stroke and covers the port (3Q. When the piston approaches the end ol its down stroke it covers the port `5i' and the steam is entrapped in the lower end ol` the cylinder to provide a cushion. Arranged Vwithin the portrt) to cover and uncover the saine is an inlet valve (31h carried hy a reeiprocatory valve stem (l5, which is vertically arranged. as shown. The numeral G6 designates a recipiocatory exhaust valver` arraiigei'l within the port l() to cover and uncover the same. and carried by a vertical valve stem (37. The lower ends ol the valve stems G5 and ($7 slidahly contact, with :i cani lever (S8, pivoted helwecn its ends to a fixed suiniort, as shown at G9. rthis cam lever ii,29/l,7823

provided at its opposite ends with anti,- friction nieans or rollers '70 and 7l, as shown.

.Means are provided. to oscillate the cani lever G8 and accordingly operate the valves lil and (5(3, comprising a. ieciprocatory cambar 72, operating within Stationary guides T3. as shown. `This cani-bar 72 is provided upon its upper edge with a. recess 74:, having curved cam end taces 'T5 and 76, as shown. It is apparent that when the rollers and Tl contact with the :faces T5 and 7G, upon the reciprocatory movement of the cani-bar T), the cam `lever 68 will loe swung :in pposite directions upon its pivot.

There are :tour canrbars 72, correspondinfLr in numhei' and arrangement to the apparatuses 22 and as clearlyj'slioivn in Fig'. l. Arranged between the ceni-loars 72 is a stationaiwfr support 77. receiving and holding a horizontal transverse shaft 78 (See Fig'. il). livol'ed upon the shaft 78 is a sleeve il), having` upsl'ani'ling cranks 8O and S1. which are preferably integral therewith. Pivoted upon the shalt 78 a sleeve 8i), having upstanding and depending cranks tl?) and Sl, integral tlierewitl.

As re clearly shown in Figs, l. and 9, the crank SO has pivotal connection, at its upper end. as shown at S5, with a Qitnian SG, which is connected with an eccentric strap 8T, which surrounds :..n eccentric 88, y'lhe eccentric is carried by the crank shaft 2].. lt is ohvious that the eccentric S8 and associated elements ser'vcs to rock the sleeve 79. As clearly shown in Figs. 8, 9 and 1.0, the upper end ol' the crank el is forked tor receiving' therein the ends of dogs 89, such ends heine pivotally connected with the torlied end hy means oi: a holt 90 or the like.

lach dog' Si! is adapted to move the adjacent upper cam-liar 72, when shifted in the direction of the arrow. lt obvious that the doo-s Si) operate the ram-liars when. moved in opposite directions. Klis clearly shown in liigs. 5 and 57 the dog 89 is provided with :i tooth or lateral extension 91,

to drop within a recess or notch 92, formed in the cainhar 72. lt is obviouswtliat when..

the dog Si) is moved invtliedircction oi" the arrow, it will move the eani`oar 72 in the same direction.-4 The inner endet the canivhar 7:2 `operates near and upon one side of tact therewith, it will be elevated and moved out of the notch U2 whereby the cam har '72 will he released and automatically returned to its startingr position` by means to be described. W'lien the cani-har 72 is released) and returned to the starting position, the inlet valve ll (see Fig. (l) is returned to its seat angl the supply of steam cut olif' from the correspoialing end of the cylinder.

lt is thus apparent that hy the longitudinal `movement or adjustment of the sliding trip 93, the time at which the supply of steam 'will be eut oif, with respect to the extent of trav-el of the piston, may be controlled or adjusted.

is more clearly shown in l*1 5, the slidtrip operates within guides 95, Aand a depending lug 90. operating within a s The lug 90 is slotted for the reception of a bolt 98, carried Yhy a swinging crank 99, pivoted at 100 upon one end of a stationary bracket 101, as shown in Figs. 1 and 5. :is clearly shown in Fig. 1, the cranks 99 have pivotal connection with rods 102 and 103. The rod 102 is pivoted with its link 99 above. the pivot 100 thereof, while the rod 103 is pivoted to the crank 99 beneath the pivot 100. The rods 102 and 103 extend forwardly` for pivotal connection with a cranl 104, rigidly secured to a rockshaft 105, turned hy a. crank 106. This crank has pivotal connection with a link 107, pivot-ed to the sleeve 108 of a centrifugal governor 109, driven from the crank shaft of the engine. This centrifugal governor may of any well known or preferred type and is equipped with a safety block 110. lt is thus apparent that 1 have provided automatic .means to shift the sliding trips 93 thereby automatically controlling the time of cut el? for the supply of steam. However, it is to be understood that the invention is in no sense restricted to the employnient of automatic means, as the same may he dispensed with and other means employed tor shift the rods 102 and 103. As illustrative of such means, the rods 102 and 103 may be. pivotcd to a` crank 111,' fixed upon a rock-shaft 112. rllhis rock-shaft is turned by a hand lever 113, carrying a latch 114, operating in proximity to a stationary quadrant 1.15.

The means to automatically return each 72 Yto the starting position, when moved tl'ierefroin and released, comprises a stationary Cylinder 116 (see Fig. 8) within which is mounted to reciprocate a piston 117, having grooves 118 for the reception of suitable packing. The piston 117 has connection with a rod .119, which is connected with the cam-bar 72, through the medium of a holt 120. Pressure is supplied into the cylinderll through a port 121, receiving; one end of pipe 112; whereby steam pressure is maintained within the cylinder 116, as will be. more full)7 explained. As soon as the cani-bar 72, (see Fig. 1) is shifted to the left, it is obvious that the piston 117 further compresses the steam within the cylinder 110', so that as soon as the cam-bar is released it is. automatically returned to the right, to the starting position.

. The depending cranlr 8l (sec Figs. 1 and 9) is forked for receiving therein the innerl ends of a pair of links 123, pivotcd therein at 124. These links are pivoted to the lower caul-barsv'i2. as shown at 125. The canibars are pcrn'mnently connected with the linlt 9i und are shifted in both directions thereby and no trip or automatic return means is employed in connection with the lower fam-bars T2. The upper crank 8?), which is rigidl)v secured to the lower cranli ttl for swinging' it, has pivotal connection as shown at 120 with a pit'man 12T. secured to an eccentric strap 128 receivingl an eccentric 129. This eccentric is carried b v the crank shaft 121 and is driven thereby. rlhc eccent-rics S8 and 129 are of course properly timed foi-actuating thev inlet and exhaust valves so that they operate in proper order.

As shown in Fig. 1. a pipe 1250 leads into the pipe 2T above the throttle vulve 2S, and thereby receives steam pressure irrespective of whether or not the throttle valve is opened or closed. The pipe 130 has connection with a pipe 131 having two branches 132 and 13?. Each branch has connection with pipes 134, which lead into the intake ports 5l, as clearly shown in Fig. llach branch has connection with the pipe rPhe operation of the apparatus is as follows:

lVhen' the valve 2S is opened, steam is supplied into the U-coupling 20, and accordingly passes into the horizontal tubular arms and will discharge into the cylinder of the engine, when the main valves are operated. The control valves (El and (5G are propcrlbv and timed in their operation, so that one valve shifting piston 3T of the upper apparatus is raised to open its main inlet valve l1. while the other main inlet valve is retained closed. llach inlet valve 3T is moved to a complete opened position, upon cach stroke of the piston` therebyY supplying steam to the c vlindcr of the cn- ;rine, at full boiler pressure. The shiftingv piston 3T of the exhaust apparatus 2?), at the opposite ond of thc c vliuder. is raised, to

`unseat the main exhaust valve, and exhaust steam from the cylinder to the atnn'isphere. Then the engine is operating, the pitinan S6 and associated elements,actuatc the dogs Si), which in turn reciprocate the cam-bars T2, in their proper order. These cam-bars rock the cam levers (39, which in turn open and close the control valves (3l and (30. The slidingA trips 9?, contact with the dogs 89, and release or disconnect them from the cambars T2. at a desired point in the stroke of the piston. The lower cam-bars 72 are reciproeated by the pitman 12T and associated elements. The cylinders 11G and associated elements servo to automatically return the upper cam-bars T2 Vto the starting' position,

when moved therefrom, and released.

lt is to he understood that the forni of our inventlon herewith shown and described lili is to he taken as a preferred example of the same7 and that various changes in the shape, size, and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the suhjoined claims.

Having thus described our invention, We claim:

l. ln an engine of the character described; a main cylinder; inlet and exhaust shells arranged near the opposite ends et the main cylinder and including vali'e shitting cylinders; main inlet and exhaust valves arranged Within the shells; valve shifting pistons mounted to reciprocate Within the valve shitting cylinders and connected with the main valves; means secured to the valve shitting cylinders and having inlet and ei;-

haust ports which lead into the saine; con

trol valves arranged within the inlet and exhaust ports; pivoted cam levers to operate the control valves; inlet and exhaust valve actuating reciprocatory cam-hars to rock the cam levers; dogs to detachahly engage with the inlet valve actuating canilrars; moans to 'trip the dogs so that they release the cam-hars; automatic means to return the cam-bars to the starting position; and means to reciprocate the exhaust valve actuating ca1n-hars.

In an engine ot the character described; a main cylinder; inlet and; exhaust shells ar ranged near the opposite ends ci the main cylinder and inchuling valve shitting cylinders; ranged within the shells; valve shitting pistons mounted to reciprocate within the valve shitting cylinders and connected with the. main valves; means secured to the valve shifting cylinders and having inlet. and eX- haust ports which lead into the saine; control valves for controlling the passage ot ain through the inlet and exhaust ports; pivoted cam levers to operate the control valves; inlet and exhaust valve actuating.

reciprocatoryvv cam-liars having recesses provided with cam Yfaces to contact with the ends et the cani levers to rock them; dogs to detarhahly engage vvitli the inlet valve actuating cam-hars to shift them in one direction; :nl iustahle means to trip the dogs so that they release the cam-bars at a desired peint in thc stroke ot the main piston oi" the engine; automatic means to return the cani-hars to the starting position includmain inlet' and exhaust valves arin pressure receiving cylinders and pistons mounted to reciprocate therein; and means to reciprocate the exhaust valve actuating cam-hars.

3. -ln an engine ont the'charaeter described; a main cylinder; in'letand'exhaust shells arranged near the opposite ends of the main cylinder and including valve shifting cjllinn ders; main inlet and exhaust valves an ranged within the' shells; valve shifting pistons mounted to reciprocate Within the valve shitting cylinders and connected with the main valves; means secured to the valve shifting cylinders and having inlet and eK- haust ports which lead into the same; control valves for controlling the passage of steam through the inlet and exhaust ports; pivoted iam levers to operate the control valves; inlet and exhaust valve actuating rcciproeatory cam-hars having recesses pro vided with cam faces to contact with the ends ot the cam levers to rock them; do s rto detachablv engage with the inlet vave .f D D actuating cani-bars to shift them in one direction; sliding trips arranged at the sides et the cam-,bars and having inclined faces to contact with the dogs and shift them out ot' engagement with the cam-bars; means to move the sliding trips; automatic means to return the inlet. valve actuating cam-bars to the starting position; and means to reciprocate the exhaust valve actuating cam-hars.

l. '.lhe combination with the valve of an engine, ot a piston to move the saine, a cylinder ior receiving the piston and having inlet and exhaust ports; inlet and exhaust valves .tor said ports having stems, a pivoted cam lever arranged to Contact with the valve stems, a reciprocatory cam-loar having cane` vtacos to contact with the ends of the pivoted cam lever and provided with a notch, a re ciprocatory slide cam arranged near and upon one side of the ean1-bar and provided with an inclined iace, a dog having a lat- Aorally extending head to contact with the ram-har and slide cam, and means to move t the dog. I

In testimony whereotl We alim our signatures in presence of tivo Witnesses.

EBWRI) BROOKS. GEORGE S. DOYLliJ W itncsses: v

J. ll. Giesen, FRANK J. lllowannu 

